21111020122010 has 32 divisors (see below), whose sum is σ = 46769029195392. Its totient is φ = 6681289884480.

The previous prime is 21111020121943. The next prime is 21111020122051. The reversal of 21111020122010 is 1022102011112.

It is a super-2 number, since 2×21111020122010² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11599460696 + ... + 11599462515.

It is an arithmetic number, because the mean of its divisors is an integer number (1461532162356).

Almost surely, 2^{21111020122010} is an apocalyptic number.

21111020122010 is an abundant number, since it is smaller than the sum of its proper divisors (25658009073382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21111020122010 is a wasteful number, since it uses less digits than its factorization.

21111020122010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23198923238.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21111020122010 its reverse (1022102011112), we get a palindrome (22133122133122).

The spelling of 21111020122010 in words is "twenty-one trillion, one hundred eleven billion, twenty million, one hundred twenty-two thousand, ten".